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L
LADDER
Non-climbable structure in the shape of a ladder from which lanterns can be hung in a vertical "stack".
LAMP
A light bulb is used in domestic situations (i.e. in the home). In the industry, we only use LAMPS. As the saying goes, "Bulbs is what you put in the ground". Example usage: "The lamp in the DSC fresnel has blown". In the TV/Film world, a lamp is called a BUBBLE.
LAMP TRAY
Lower section of the body of a theater lantern on which the lamp holder is mounted. Some lamp trays are hinged, some are removable from the rest of the body. Modern safety legislation (UK) requires that the lamp tray cannot be opened until power is disconnected.
LAMPY
Theater / Rock & Roll lighting technician. Distinct from a "Techie" who may also be a carpenter or stage crew member. A lampy only concerns him/herself with lighting.
LANTERN
1) General term for unit of lighting equipment including spotlight, flood etc. Term now being replaced by the internationally recognized "luminair" (esp. Europe) or "instrument" in the US.. 2) Glazed section of roof usually in haystack form over the fly tower that automatically opens in the case of fire. An updraught is created which inhibits fire from spreading quickly into the auditorium, and prevents build-up of smoke at stage level.
LASER
Acronym of Light Amplification by Stimulated Emission of Radiation. A very high energy beam of light that remains virtually parallel throughout its length. Visible in the air only when a haze of smoke or dust is introduced. Great care is required when using lasers as this energy can cause permanent damage to the retina of the eye.
LASER BED
A complete laser assembly including laser tube, control system, scanning or beam splitting components or other effects.
LASER HEAD
The laser tube assembly part of a laser system.
LASER LIGHT
A light that emits a highly controlled narrow beam of light.
LATCH PAD OR BUTTON
Switches a channel on or off with a touch on, touch off action.
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